[Backgroundrb-devel] "include DRbUndumped" error

James Hughes hughes.james at gmail.com
Tue Aug 8 13:09:34 EDT 2006


Hi Philip,

I had similar problems due to the fact that I was storing objects of
the class that included DrbUndumped in the rails session variable. I
had similar looking stack traces to what you have included here. Don't
store the whole object in the session, just store the id and use
find() to get the object.

hth,
James

On 8/7/06, Philip Lipu Tsai <tsailipu at gmail.com> wrote:
>  Hi,
>
>  I am getting my hands on trying the cool BackgrounDrb plugin.
>  Following various discussions and suggestsion, I included "include DRbUndumped"
>  in my ActiveRecord model.  However, the following exception occurs
> after I tried this and hit the page that uses this model.  Does anyone
> know why this is so?  Is it possible that an object cannot be
> DRbUndumped (that would mean, we can't ever pass a reference to such
> object across DRb for BackgrounDrb to process)?
>
>  Thanks!
>  Philip
>
>
> TypeError (can't dump):
>     /usr/lib/ruby/1.8/drb/drb.rb:395:in `_dump'
>     /usr/lib/ruby/1.8/pstore.rb:348:in `dump'
>     /usr/lib/ruby/1.8/pstore.rb:326:in `transaction'
>     /usr/lib/ruby/1.8/cgi/session/pstore.rb:90:in `update'
>     /usr/lib/ruby/1.8/cgi/session/pstore.rb:97:in `close'
>     /usr/lib/ruby/1.8/cgi/session.rb:330:in `close'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/base.rb:
> 984:in `close_session'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/base.rb:
> 1026:in `process_cleanup_without_flash'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/flash.rb
> :147:in `process_cleanup_without_filters'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/filters.
> rb:439:in `process_cleanup_without_session_management_support'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/session_
> management.rb:126:in `process_cleanup_without_components'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/componen
> ts.rb:182:in `process_cleanup'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/base.rb:
> 385:in `process_without_filters'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/filters.
> rb:377:in `process_without_session_management_support'
>     /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/session_
> management.rb:117:in `process'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/dispatcher.rb:38:in `dispatch'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:115:in `handle
> _dispatch'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:81:in `service
> '
>     /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
>     /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
>     /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
>     /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
>     /usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
>     /usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
>     /usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
>     /usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:67:in `dispatc
> h'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/commands/servers/webrick.rb:59
>     /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
>     /usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependenc
> ies.rb:147:in `require'
>     /usr/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/commands/server.rb:30
>     /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
>     /usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependenc
> ies.rb:147:in `require'
>     script/server:3
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel
>


-- 
James Hughes
Web application developer
Vancouver, BC

"Developing a coherent political analysis is in many respects
contingent upon an ability to connect one context to another, a
process not dissimilar to playing the kid's game of dot-to-dot."
 - Ward Churchill, from '"A Government of Laws"?'


More information about the Backgroundrb-devel mailing list